YD06CG001199 当t=2s时,电压u=100sin314t的瞬时值为( )V
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YD06CG001199 当t=2s时,电压u=100sin314t的瞬时值为( )V
A.100
B.50
D.30
正确答案是C

YD06CG001199 当t=2s时,电压u=100sin314t的瞬时值为( )V
A.100
B.50
D.30
正确答案是C